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I did a few polls in Corvette groups to see what fluids are commonly being used in ZF6 transmissions. Below is a list of the fluids people seem to be commonly using, their Viscosity at 100c and Pour Point. Lots of people are using Amsoil - which is waaaaay thinner than the 10w60 what ZFdoc Bill...

Adds another variable. As others have said, depending on the prior filter design, the whole improved experience could be attributable to a superior anti drain back valve on the Bosch Premium filter.

I had heard that the Purolator Boss was really low efficiency 99% @46um, but when I cut the filter open for my exact application PBL24011 it looked sooo good that I was hoping this number was for some other Boss filter and the PBL24011 would be much better - so I emailed Tech Service and they...

In 1997 this 1992 Corvette was brought to Lingenfelter. 2 months and $15,000 1992 dollars later it came back with a pretty special LT1. The oil Lingenfelter filled it with was a 10w40 weight. A fine oil. In my estimation, for the now 26 year old engine that still sees track and autocross use...

30 weight oils are specd in high performance V8s of this era to try to hit CAFE fuel economy targets. For optimal performance, protection and longevity … 40 or 50 weight oils are best. Both of these engines have over 100,000 miles, which also supports bumping up the viscosity.

AC Delco is a very good filter. It’s 98% efficient at 25-30 microns. The Fram Titanium is 99+% efficient at 20 microns. It’s not a huge difference - but cleaner oil is better for long-term performance optimization.

89 has a L98 engine and sees everything from road trips to autox and track days. Oil = Mobil 1 15w50, Filter = Fram Titanium FS5 92 has a Lingenfelter LT1 engine, it also sees autox and track days, and it may have a road trip in its future! Oil = Mobil 1 Supercar 5w50, Filter = Fram Titanium...

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Hey Richard, did you know that the Titanium 3980 filter media surface area is 64.2% greater than the Endurance 3980. And did you know the Ultra 3980 and TG3980 curiously have bypass valves where none of the other 9 filters for this application do? Me neither 😜 Because you’ve seen one Ultra or...

Do you definitively know why Fram includes this OR statement? *FRAM Group testing of average filter efficiency of FE8A, FE3387A and FE4967 or equivalent FRAM TG or EG models under ISO 4548-12 for particles greater than 20 microns.

fwiw, Fram doesn't say that they've ISO 4548-12 tested Endurance filters - the numbers on their website could be from TG or EG filters. Amsoil does not beat around the bush - they've tested Ea filters.

fwiw - i was joking re all the weight given to the Ascent testing. i personally think all the "conclusions" reached by the BITOG community re the Ascent testing were a huge leaps (ridiculous) based on testing of a single filter from each line. i have no reason to believe Fram is lying about...

I put most details in the video description (below). It’s a hobby, show, race, track car that gets 1-2 oil changes a year with generally low mileage OCIs. instagram.com/c4lingenfelter I have another Corvette that gets more miles. facebook.com/c4crosscountry I may road trip with the...

fwiw - I’ve not presented any assumptions or opinions as facts. Given the manufacturer claimed data, the cut-open construction review, and considering the Ascent data … I’m personally choosing the Fram Titanium to use in my 92 Lingenfelter. Which would you choose and why?

@dnewton3 BITOG members have concluded that the Titanium filters are equal to the OG Ultra (pink media / wire backed) and also that the Endurance filters are Royal Purple filters which Ascent testing showed to be inferior to the Ultra. So a filter having 64.2% less of a filter media known to be...

All the filters I have cut open in this test fit my 1992 Lingenfelter Corvette. I’m happy to share the results as I think that they’re interesting and fun. But, I definitely do feel that if other people are really interested in the construction of filters available for a specific car they own...

Even within a Fram line, the filters can be different. The Titanium in this test is shorter than the Endurance, but the media width is the same. And the Ti doesn’t have the bottom seal that the Ti 3980 does. The XG5 Ultra I just used on my 89 Corvette had wire mesh backing, the Ultra XG3980...

I know you saw this in my other post, but just to have the answer to your question also in this thread:

yeah I thought it was interesting that a few days ago the rep said basically the same thing as 3 years ago.

Above is the Titanium, below is the Endurance. And yes, the pink Ti media is thicker than the white Endurance media.